An image forming apparatus according to an embodiment of the present disclosure includes a receiving unit, a controlling unit, an information accumulating unit, a sleep mode response data generating unit, and a transmitting unit. The receiving unit receives information requesting data. The controlling unit, in a normal mode, generates first response data after receiving the information requesting data. The information accumulating unit accumulates information associated with the first response data. The sleep mode response data generating unit, in a sleep mode, generates second response data on the basis of the information accumulated by the information accumulating unit. The transmitting unit transmits one of the first and the second response data.